diff --git a/package.json b/package.json
index b07f7a3c4..bfc33bfb9 100644
--- a/package.json
+++ b/package.json
@@ -70,10 +70,10 @@
     "json": "^9.0.4",
     "lodash.defaultsdeep": "4.6.1",
     "pngjs": "^3.3.2",
-    "scratch-audio": "latest",
-    "scratch-blocks": "latest",
+    "scratch-audio": "0.1.0-prerelease.20200528195344",
+    "scratch-blocks": "0.1.0-prerelease.20210331033330",
     "scratch-l10n": "^3.1.20181129221712",
-    "scratch-render": "latest",
+    "scratch-render": "0.1.0-prerelease.20210629213715",
     "scratch-render-fonts": "^1.0.0-prerelease.20210401210003",
     "scratch-storage": "^1.1.0",
     "scratch-svg-renderer": "^0.2.0-prerelease.20210325225314",